WEST SACRAMENTO, Calif. (Interstat) — Gage Jump pitched six scoreless innings and Brian Serven hit a two-run homer in the seventh inning to lift the Athletics to a 4-3 victory over the Boston Red Sox on Tuesday at Sutter Health Park.

Jump, who entered the game with a 3-6 record and had allowed six earned runs in each of his previous two starts, allowed three hits and struck out seven while walking none over six innings. He did not factor into the decision but his performance set the stage for the Athletics’ bullpen.

Boston grabbed an early opportunity in the first inning when Jahmai Jones led off with a double, but the Red Sox failed to score. Athletics starter Jake Bennett worked around the threat and kept Boston off the board through the first six innings.

The Athletics broke the scoreless tie in the second inning. Tommy White singled and advanced to second on a sacrifice bunt by Colby Thomas. Henry Bolte followed with an RBI single to center field, scoring White for a 1-0 lead.

Boston threatened again in the fifth when Jarren Duran singled and Carlos Narváez walked, but Jump struck out Jones to end the inning. The Red Sox grounded into three double plays during the game, stifling potential rallies.

The decisive inning came in the seventh. With one out, Alika Williams sacrificed Bolte to second. Serven then homered to center field, his first of the season, scoring Bolte and giving the Athletics a 3-0 lead. Jacob Wilson followed with a double but was left stranded.

Boston finally got on the board in the eighth. Masataka Yoshida singled and Anthony Seigler walked, moving Yoshida to second. After Romy Gonzalez grounded into a double play, Yoshida advanced to third. Willson Contreras walked, and Wilyer Abreu singled to right field, scoring Yoshida to cut the deficit to 3-1. Ceddanne Rafaela struck out to end the inning.

The Athletics answered immediately in the bottom of the eighth. Tommy White singled and Lawrence Butler, batting as a pinch hitter, doubled to center field, scoring White and extending the lead to 4-1.

Boston mounted a rally in the ninth against Athletics closer Hogan Harris. With one out, Duran singled. Andruw Monasterio struck out, but Connor Wong, pinch hitting, homered to left field, his second of the season, bringing Duran home and trimming the margin to 4-3. Harris then retired Anthony Seigler on a fly ball to center field to earn his ninth save.

Jump’s outing was a bounce-back performance after he had allowed six earned runs in 4 2/3 innings against Arizona on July 22 and three earned runs in 3 2/3 innings against Washington on July 17. Bennett took the loss for Boston, allowing three earned runs on six hits over 6 1/3 innings while striking out four and walking one.

Jovani Morán pitched 2/3 of a scoreless inning in relief for Boston. Luis Medina worked 1 2/3 innings for Oakland, allowing one earned run on two hits. Harris allowed two earned runs on three hits in 1 1/3 innings but recorded the final three outs.

The Red Sox outhit the Athletics 8-9 but stranded six baserunners and grounded into three double plays. The Athletics made two sacrifice hits.

The victory improved the Athletics’ record to 45-62, while the Red Sox fell to 55-51. The teams played a sellout crowd of 10,356 in a game that lasted 2 hours, 32 minutes.

The Athletics had lost the series opener 4-2 on Monday. Boston had won four of its previous five games entering Tuesday.

Interstat’s game simulator had projected a final score of Boston Red Sox 8, Athletics 3. Interstat’s ELO system had projected Boston with a 62.50 percent probability to win. Boston had been installed as a pregame favorite with a spread of minus 1.5. The total score of 7 went over the over/under line of 9.